Ignition apparatus for an internal combustion engine

Details Ignition apparatus for an internal combustion engine Ignition apparatus for an internal combustion engine

1991-04-08

1992-05-05

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Having specific trigger circuitry

123651, F02P 304

Patent

active

051098270

ABSTRACT:
An ignition apparatus for an internal combustion engine is provided which is simple in the circuit arrangement and highly reliable in operation. An electromagnetic pickup coil generates an ignition signal having a magnitude proportional to the number of revolutions per minute of the engine in synchrony with the rotation thereof for controlling an ignition coil. A waveform shaper in the form of a comparator shapes the ignition signal from the pickup coil into a signal containing a pulse having a rising edge and a falling edge. An integrator integrates the ignition signal from the pickup coil to provide a rpm voltage representative of the number of revolutions per minute of the engine. A signal level controller controls the voltage level of the ignition signal based on the rpm voltage generated by the integrator. A current absorber absorbs from the ignition signal a current in accordance with the voltage of a power supply which powers the ignition coil. A switch turns off the current absorber when the shaped signal generated by the waveform shaper rises. A current-absorption suppressor suppresses a current to be absorbed by the current absorber in accordance with the rpm voltage generated by the integrator.

REFERENCES:
patent: 4271812 (1981-06-01), Bodig et al.
patent: 4397290 (1983-08-01), Tanaka et al.
patent: 5014675 (1991-05-01), Koiwa

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